Mail Apps 0 Inbox and 0 Sent

We used NC for more than 1 year i noticed all users with mail account we found out that the Mail Apps
when sending and recieved emails from others it shows inbox and Sent to 0 Value, but inbox has many received and same with Sent Folder

the versionof Mail we used still 0.7.4

noresult

Not sure if the developer is active here, please report on the linked bug tracker: